Dynamical constraints on a dark matter spike at the Galactic centre from stellar orbits
Dynamical constraints on a dark matter spike at the Galactic centre from stellar orbits
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DOI：
10.1051/0004-6361/201832652
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发表时间：
2018-11-05
影响因子：
6.5
通讯作者：
Lacroix, Thomas
中科院分区：
文献类型：
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作者：
Lacroix, Thomas
在这项工作中，我使用的天体测量和光谱数据的S2星星在银河系中心（GC）到2016年，以获得特定的限制的大小的暗物质（DM）穗周围的中央超大质量黑洞Sgr A*。这些限制是最好的直接约束DM尖峰在GC的非湮灭暗物质和排除尖峰半径大于几十秒差距的尖头外晕和几百秒差距的核心外晕。
In this work I use astrometric and spectroscopic data on the S2 star at the Galactic centre (GC) up to 2016 to derive specific constraints on the size of a dark matter (DM) spike around the central supermassive black hole Sgr A*. These limits are the best direct constraints on a DM spike at the GC for non-annihilating dark matter and exclude a spike with radius greater than a few tens of parsecs for cuspy outer halos and a few hundred parsecs for cored outer halos.